Tracing the nonequilibrium topological state of Chern insulators
- Schüler, Michael Department of Physics, University of Fribourg, Switzerland
- Werner, Philipp Department of Physics, University of Fribourg, Switzerland
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16.10.2017
Published in:
- Physical Review B. - 2017, vol. 96, no. 15, p. 155122
English
Chern insulators exhibit fascinating properties, which originate from the topologically nontrivial state characterized by the Chern number. How these properties change if the system is quenched between topologically distinct phases is, however, not fully understood. In this paper, we investigate the quench dynamics of the prototypical massive Dirac model for topological insulators in two dimensions. We consider both dissipationless dynamics and the effect of electron-phonon interactions, and ask how the transient dynamics and nonequilibrium steady states affect simple observables. Specifically, we discuss a time-dependent generalization of the Hall effect and the dichroism of the photoexcitation probability between left and right circularly polarized light. We present optimized schemes based on these observables, which can reveal the evolution of the topological state of the quenched system.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Physique
- Language
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 305781
- DOI 10.1103/PhysRevB.96.155122
- Persistent URL
- https://folia.unifr.ch/unifr/documents/306095
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